preparatory

US /prɪˈper.ə.tɔːr.i/

UK /prɪˈper.ə.tɔːr.i/

chuẩn bị trước, khai mào, sửa soạn trước, dùng để dự bị, dùng mở đầu

serving as or carrying out preparation for a task or undertaking.

•

more preparatory work is needed